I also have a strange problem.
When the hs boots there is communication between the hs and the knx system. When you switch lights on QC they turn on and you receive a status on QC.
But after approx. one hour the communication only works from hs to knx bus. You still can turn on and off lights bus the communication stops working from knx system to hs. The status object change isn’t shown in QC. When you reboot the hs it works again for approx. one hour.
Anybody an idea what’s the problem?